diff -r 24525070d934 -r 4eff16f47ae2 src/hotspot/share/prims/unsafe.cpp
--- a/src/hotspot/share/prims/unsafe.cpp	Wed Dec 12 14:18:16 2018 +0100
+++ b/src/hotspot/share/prims/unsafe.cpp	Wed Dec 12 18:35:26 2018 +0100
@@ -926,11 +926,12 @@
   }
 } UNSAFE_END
 
-static void post_thread_park_event(EventThreadPark* event, const oop obj, jlong timeout) {
+static void post_thread_park_event(EventThreadPark* event, const oop obj, jlong timeout_nanos, jlong until_epoch_millis) {
   assert(event != NULL, "invariant");
   assert(event->should_commit(), "invariant");
   event->set_parkedClass((obj != NULL) ? obj->klass() : NULL);
-  event->set_timeout(timeout);
+  event->set_timeout(timeout_nanos);
+  event->set_until(until_epoch_millis);
   event->set_address((obj != NULL) ? (u8)cast_from_oop<uintptr_t>(obj) : 0);
   event->commit();
 }
@@ -942,7 +943,16 @@
   JavaThreadParkedState jtps(thread, time != 0);
   thread->parker()->park(isAbsolute != 0, time);
   if (event.should_commit()) {
-    post_thread_park_event(&event, thread->current_park_blocker(), time);
+    const oop obj = thread->current_park_blocker();
+    if (time == 0) {
+      post_thread_park_event(&event, obj, min_jlong, min_jlong);
+    } else {
+      if (isAbsolute != 0) {
+        post_thread_park_event(&event, obj, min_jlong, time);
+      } else {
+        post_thread_park_event(&event, obj, time, min_jlong);
+      }
+    }
   }
   HOTSPOT_THREAD_PARK_END((uintptr_t) thread->parker());
 } UNSAFE_END